STIMULATED SOFT ELECTRON-SPIN ECHO ENVELOPE MODULATION SPECTROSCOPY

An improved technique of electron spin echo envelope modulation (ESEEM ) spectroscopy using soft pulses is proposed. It is functionally relat ed to the standard three-pulse stimulated echo experiment, but has an improved bandwidth. The general class of soft-ESEEM experiments is ana lyzed theoretically by using a product operator formalism. The predict ed features are verified experimentally, in particular, the lack of bl ind spots and the observation of high modulation frequencies.